Coffee urn



L.. WERTHEMER COFFEE URN Filed Aug. 2. 1922 3 WH MM u/r o 5 8 3 MW. f///l/f/l .r. :z :xx.. 6 .w z s .\f\ nu b. J n al 7 3 f H.. D 3 l .H l ,/1 l 1.,., k.

A TTOHNEV Patented @et 23, 1923.

UNHVE@ LEO WEBTHEIMER, OF BUFFALO, NEW YORK.

COFFEE URN'.

Application filed August 2, 1922. Serial No. 579,111.

To all whom 'it may concern.'

Be it known that I, Lno WERTHEIMER,

a citizen of the United States of America,

residing in the city of Buialo, county of Erie, and State of New York, have invented certain new and `useful improvements in Coffee Urns, of which the Jfollowing is a full, clear, and exact description.

My invention relates generally to coee urns, and more particularly to that type of urn in which the coffee may be circulated through the urnl and heated water added to it.

The principal object of my invention has been yt0 provide a device of this nature having a water jacket for the coffee re-l ceptacle and a separate water jacket for the exterior of the urn.

Another object has been to provide an air space separating the two water jackets, whereby water added to the liquid coiee will be preheated, and the temperature of the liquid coffee will not be reduced by'such addition ofl water.

Another object has been to provide a device in which the water in the jackets shall be brought into intimate contact with the heating means of the urn, whereby the highest efficiency may be obtained.

Furthermore, it has been an object to provide a iue for conducting a portion of the heat trom the heating means through the water of the outer jacket.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, the single figure ot' which shows a vertical sectional elevation of the device.

The device comprises an outer casing 5, which is provided with a bottom 6 having a cup-shaped central portion 7 to be hereinafter described. The bottom 6 ,is arranged at a suitable distance above the lower edge of the casing sol as to accommodate the heating means of the urn. The outer casing below the bottom 6 is provided with a plurality of apertures 8. The outer casing is also provided with a top 9, arranged some distance below the upper edge thereof. 5@ Supported by the top 9 is a jacket 10 which is arranged in interepaced relation with the outer casing 5 and is very much shorter than the casing 5, whereby a water space 11 is provided. A water inlet 12 is connected to the outer casing, whereby water may be supplied to the water-space 11. Arranged within the jacket 10 is an inner jacket 13. This jacket is also supported by the top 9, and is in interspaced relation with the jacket 10, whereby an air-space 14 is provided. rThe inner jacket 13 is shorter than the jacket 10, so that the air-space extends across the bottom of the inner jacket as well as around the sides thereof. A coffee receptacle 15 is disposed within the inner jacket 13, and a water-space 16 is provided l around the coffee urn. An overow pipe 17 is carried by the bottom of the jacket 10, and passes through the bottom of the inner jacket 13 and up within the waterspace 16 to a point near the top thereof. TWater is thus supplied to the water-space 16 by water from the water-space 11. It will be seen that the water-spaces 11 and 16 are separated by the dead air-space 111, so that when the water in the space 11 is replenished by water of a lower temperature, the temperature of the water within the space 16 will not be affected by the reduced temperature ot' the water in the space 11. A vent pipe 32 having a small opening is connected to the jacket 10 so as to allow the air in the space 141.` to expand and contract.

The cot'ee urn 15 is provided in its bottom with a drain 20, which registers with an opening 21 in the bottom ot the inner jacket 13 and also with a drain. nipple 22. lThe ydrain nipple is preferably secured to the bottom of the inner jacket 13 and extends through the bottom of the jacket 10 and into the water-space 11. A. drainpipe 23 is con nected with the drain nipple 22 at one end, having its other end passed through the outer casing 5 where it is provided with a faucet 24 from which the coii'ee may be dispensed. Arranged in the top of the coitee urn is a discharge-pipe 25. the inner end ot which is bent downwardly and is disposed over the center ofthe coifee receptacle. where it is provided with a spray nozzle 26. rlhe outer end of the discharfre-pipe 25 is connected with a discharge side ci? pump 27,

preferably of the centrifugal type, by meansV of a. pipe 28. The suction side of the pump 27 is connected with the outer end ofthe pipe 23, and a valve 29 is arranged at thev lili Citi

suction side of the pump. lt is obvious that the connection of the suction side of the pump to the drainpipe 23 is such that the operation of the faucet 2e is independent of this connection. By Athis arrangement the coffee in the coffee receptacle 1 5 maybe recirculated by the pump.

ln order to supply heated water to ,theV

coffee receptacle i5, provide a syphonpipe 30, which passes through the sideof the outer casingat a point near its top and extends downwardly into the water-space 11 toa point nearthe bottom thereof. rEhe upper end of the syphon-pipe 3() is connecte ed to the pipe 28 and has a valve `3l located 'in it, whereby the supply of water from the space 1l may be controlled. When it is de-v sired to add water to the coffee receptacle 15, the valve 29 having been closed, the valve 3l. is opened, whereby water from the waterspace 11 will be yforced upthrough the syphon-pipe 30 past valve l3l and into pipe 25 whence it will be discharged through the noZZleQG into the receptacle.

A pipe coil 35 is arranged withinthe recess 36 of the 'cup-shaped portion 'Tof the bottom lG, and it is connected by means of Y pipes 37 to the bottom ofthe inner jacket 13,

wherebyy the water in the space 16 of said ,jacket will. be .circulated through the pipe coil 35 and thus heated. So. as to conduct heatup into the cup-shaped yportion 7, a pipe 38 is provided.' This pipe has'its lower end connected to the cup-shaped portion 7 and its upper end passed through the-outer casing 5 near the top thereof. This not only' whereby lthe water in the space l1 will be ,circulated through the coil.

Obviously, some modifications ofthe details herein shown and described may be made without departing' from the spirit of my 'invention or the'scope .of theappenderl claims; and Ido not therefore, wish to be limited lto the exact embodiment herein shown and described, the form shown being merely a preferred embodiment thereof.v

Having thus describedfmy invention, what I claim is:

l. A vcoffee urn comprising an outer; casing,a water space withinthe casing, a coffee receptacle interior-1y supportedby the casing, a water-space surrounding the receptacle, and a dead air-space interposed be-v tween the two water-spaces.

2. A coffee urn comprising a coffee receptacle, an inner jacket surrounding such receptacle and provided with van inner water-space, a jacket arranged in interspaced relation with the inner jacket thereby provi'dinga dead air-space, and an outer casing surrounding the jacket, whereby an outer water-space is provided.

3. A coffeeurn comprising an outer casing, a water-spacewithin the casing, a coffee receptacle interiorly supported bythe casing, a water-space surrounding the receptacle,a dead air-space interposed between thetwo water-spaces, anda heating coil for each of the water-spaces.V Y

4. A coffee urn comprising a coffee receptacle, an inner jacket .surrounding such receptacle and` provided lwith an inner water-space, a j acket arranged in intersp'aced relation'with the inner jacket thereby providing .a dead .air-space, an outer casing surroundingV the jacket, whereby an vouter water-space is provided, and a heatingcoil for eachof the water-spaces- 5. A coffee urn comprising an outer casing, having bottom provided with a cupshaped portion, a water-space Vwithin theY casing, a coffee receptacle interiorly supportedbythe casing, and a ventpipe connected to the cup-'shaped portion, passingthrough the water-space and extending through the-outerjacket :at a point near thel top thereof. a

6. A coffee urn comprisingV anouter 'casing Y having` abottom provided withl a cup-'shaped portion, Van outer .water-space within the casing, a coffee receptacle interiorly 'sup ported bythe casing, an inner water-space surroundingthe receptacle, a dead. air-space `interposed between the Vtwo water-spaces. Y land a vent pipe connected to the cup-'shaped port-ion, .passing through the water-space and extending through theouter casing at a. point near the top thereof.

7. .A coee urn comprising'ian outer vcasing, having a bottoni provided with acup shaped portion, an outer water-space within the casing, a coffee ,receptacle 'interiorly supported by the casing, an `inner waterspace surrounding the receptacle, :a dead air-sp ace Iinterposed between the two waterposedbelow the bottoinof the inner 'water casing and connected withthe outer waterspace. Y

coffee .urncomprising an outer .casing, havingia bottom provided. with acup- .shaped portion,;an outer'watervspace within the casing, a coffeereceptacle .interiorlysup portedby tha Casing: en mier ywater-space Y12() spaces, a heatingr coil Vdisposed within the v I cupshaped portion and connected with the Vinner water-space,i and a heatingrcoildissurrounding the receptacle, a dead airspace interposed between the two Waffel`- spaces, e vent pipe connected to the oupshaped portion, passing through the waterspace and extending through the outer casing at a point near the top thereof, a heating coil disposed within the cup-shaped portion and connected with the inner waterspace, and a heating coil disposed below the bottom of the casing and connected with 10 the outer water-space.

In testimony whereof, I have hereunto signed my name.

LEG WERTHEIMER. 

